package ru.sviridov.sellandbuy;

import ru.sviridov.sellandbuy.model.Auth;
import ru.sviridov.sellandbuy.model.IAuth;
import ru.sviridov.sellandbuy.tasks.base.BaseTask;
import ru.sviridov.sellandbuy.tasks.recipients.LoginRecipient;
import ru.sviridov.sellandbuy.tools.Constants;
import ru.sviridov.sellandbuy.url.APIGroup;
import ru.sviridov.sellandbuy.url.APIMethod;
import ru.sviridov.sellandbuy.url.URL;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class LoginActivity extends Activity {

	public static final String EXTRA_LOGIN = "ru.sviridov.sellandbuy.extra.LOGIN";

	private static final int REQUEST_REGISTER = 1;

	private BaseTask<?> mAuthTask = null;

	private String mLogin;
	private String mPassword;

	// UI references.
	private EditText mLoginView;
	private EditText mPasswordView;
	private View mLoginFormView;
	private View mLoginStatusView;
	private TextView mLoginStatusMessageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		ContentViewMapper.setContentView(this);

		// Set up the login form.
		mLogin = getIntent().getStringExtra(EXTRA_LOGIN);
		mLoginView = (EditText) findViewById(R.id.etLogin);
		mLoginView.setText(mLogin);

		mPasswordView = (EditText) findViewById(R.id.password);
		mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
			@Override
			public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
				if (id == R.id.login || id == EditorInfo.IME_ACTION_GO) {
					attemptLogin();
					return true;
				}
				return false;
			}
		});

		mLoginFormView = findViewById(R.id.login_form);
		mLoginStatusView = findViewById(R.id.login_status);
		mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

		findViewById(R.id.sign_in_button).setOnClickListener( new View.OnClickListener() {
			@Override
			public void onClick(View view) {
				attemptLogin();
			}
		});
		
	}

	/**
	 * Attempts to sign in or register the account specified by the login form.
	 * If there are form errors (invalid email, missing fields, etc.), the
	 * errors are presented and no actual login attempt is made.
	 */
	public void attemptLogin() {
		if (mAuthTask != null  && mAuthTask.getStatus()!=AsyncTask.Status.FINISHED) {
			return;
		}

		// Reset errors.
		mLoginView.setError(null);
		mPasswordView.setError(null);

		// Store values at the time of the login attempt.
		mLogin = mLoginView.getText().toString();
		mPassword = mPasswordView.getText().toString(); //FIXME implement Utils.md5(mPasswordView.getText().toString());

		boolean cancel = false;
		View focusView = null;

		// Check for a valid password.
		if (TextUtils.isEmpty(mPassword)) {
			mPasswordView.setError(getString(R.string.error_field_required));
			focusView = mPasswordView;
			cancel = true;
		} else if (mPassword.length() < 4) {
			mPasswordView.setError(getString(R.string.error_invalid_password));
			focusView = mPasswordView;
			cancel = true;
		}

		// Check for a valid email address.
		if (TextUtils.isEmpty(mLogin)) {
			mLoginView.setError(getString(R.string.error_field_required));
			focusView = mLoginView;
			cancel = true;
		} 

		if (cancel) {
			// There was an error; don't attempt login and focus the first
			// form field with an error.
			focusView.requestFocus();
		} else {
			// Show a progress spinner, and kick off a background task to
			// perform the user login attempt.
			Auth params = new Auth();
			params.setAuthRequered(true);
			params.setLogin(mLogin);
			params.setPassword(mPassword);
			
			mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
			showProgress(true);
			mAuthTask = new BaseTask(this, new LoginRecipient());
			mAuthTask.setQueryParams(params);
			mAuthTask.execute(URL.getURL(APIGroup.MEMBERSHIP, APIMethod.GET_USER_INFO));
		}
	}

	/**
	 * Shows the progress UI and hides the login form.
	 */
	@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
	public void showProgress(final boolean show) {
		// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
		// for very easy animations. If available, use these APIs to fade-in
		// the progress spinner.
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
			int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime);

			mLoginStatusView.setVisibility(View.VISIBLE);
			mLoginStatusView.animate().setDuration(shortAnimTime).alpha(show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
				@Override
				public void onAnimationEnd(Animator animation) {
					mLoginStatusView.setVisibility(show ? View.VISIBLE	: View.GONE);
				}
			});

			mLoginFormView.setVisibility(View.VISIBLE);
			mLoginFormView.animate().setDuration(shortAnimTime).alpha(show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
				@Override
				public void onAnimationEnd(Animator animation) {
					mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
				}
			});
		} else {
			// The ViewPropertyAnimator APIs are not available, so simply show
			// and hide the relevant UI components.
			mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
			mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
		}
	}

	public void onClickSkip(View view){
		startActivity(new Intent(this,MainActivity.class));
		finish();
	}
	
	public void onClickRegister(View view){
		startActivityForResult(new Intent(this, RegisterActivity.class), REQUEST_REGISTER);
	}

	public void onClickRestore(View view){
		startActivityForResult(new Intent(this, RestoreActivity.class), REQUEST_REGISTER);
	}
	
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(requestCode==REQUEST_REGISTER && resultCode==RESULT_OK){
			mLoginView.setText(data.getStringExtra(RegisterActivity.LOGIN));
		}
	}

	public void storeAuth() {
		Editor editor = getSharedPreferences(Constants.USER_PREFS, Activity.MODE_PRIVATE).edit();
		editor.putString(IAuth.LOGIN, mLogin);
		editor.putString(IAuth.PASSWORD, mPassword);
		editor.commit();
	}
}
